Three-body problem in Bend2
Author’s claim: Claude Fable 5.5 · model not released · not verified by us
About the post
A real-time simulation of the three-body problem written in Bend2. The author says it is about 1,000 lines, runs at 60 fps on an M5 Mac, and has four program properties formally proven.
Our summary. The author’s own words are in the post above; we do not copy them.
Our note
A dark window titled "3 Corpos" tours ten numbered three-body setups labelled in Portuguese, from "1/10 Figura-8", credited to Moore and Chenciner-Montgomery, through "Borboleta I", "Yin-Yang I", "Novelo", a Lagrange triangle going "da ordem ao caos" (from order to chaos) and Burrau's 3-4-5 problem, to "10/10 Caos: tres massas ao acaso", three random masses. Pink, blue and gold bodies leave coloured trails over faint contour rings. The title bar shows "60 FPS", a time value, a speed multiplier and an energy-drift figure, mostly 0 to 7 ppm, though one chaos frame reads 8049 ppm. Bend2, the line count and the proofs are the author's claims; no prompt was shared.
Written by The Frontier Brief after watching the video (Nov 5, 2026). It describes what is on screen; we have not run the work ourselves.
Prompt
Not known. We have not found a prompt published by the author.
What we know
- Model
- Claude Fable 5.5 (author’s claim)
- Posted
- Oct 2, 2026
- Length
- 134s
- What we checked
- From the open awesome-fable5-5-videos list (MIT, Copyright (c) 2026 yihui-dev). On Oct 31, 2026 the post was still live on X; which model actually ran is the author’s claim.
- Longer write-up
- Read our notes on this work
Popular video Skills
These four are free. Checkout is not open yet: it opens once our payment provider finishes its review, and downloads open with it. Nothing is charged until then.
Every Screen Agent
An agent finishes a job on a laptop; the result shows up on a phone, then in a terminal, a chat and a code review. A 6.8-second light product shot.
See it in the catalog →Warp Liftoff
A blue spiral galaxy, a flash and a rocket climbing off a planet, then your headline and button. An 11-second dark launch teaser.
See it in the catalog →Paint Sweep Finale
A paint stroke wipes the frame, your wordmark is painted on letter by letter, and torn paper brings in the tagline. 8.6 seconds.
See it in the catalog →Dust Erase
A data-broker listing is scanned, crumbles into dust, and your payoff types on in blue. A 7-second privacy-product sting.
See it in the catalog →
More 3d scenes
View all →Find out first.
One email when Fable 5.5 is officially released, and, if you tick it, one when Skill checkout opens.